/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.apache.linkis.orchestrator.computation

import org.apache.linkis.common.utils.ClassUtils
import org.apache.linkis.orchestrator.computation.conf.ComputationOrchestratorConf
import org.apache.linkis.orchestrator.core.OrchestratorSessionBuilder
import org.apache.linkis.orchestrator.{Orchestrator, OrchestratorSession}
import org.apache.commons.lang.StringUtils

/**
  *
  *
  */
trait ComputationOrchestratorSessionFactory {

  def getOrCreateSession(id: String): OrchestratorSession

  def getOrchestrator(): Orchestrator

  def createSessionBuilder(id: String): OrchestratorSessionBuilder

  def getOrCreateSession(orchestratorSessionBuilder: OrchestratorSessionBuilder): OrchestratorSession
}

object ComputationOrchestratorSessionFactory {

  private var sessionFactory: ComputationOrchestratorSessionFactory = _

  def getOrCreateExecutionFactory(): ComputationOrchestratorSessionFactory = {

    if (sessionFactory == null) synchronized {
      if (sessionFactory == null) {
        sessionFactory = if (StringUtils.isNotBlank(ComputationOrchestratorConf.COMPUTATION_SESSION_FACTORY_CLASS.getValue))
          ClassUtils.getClassInstance(ComputationOrchestratorConf.COMPUTATION_SESSION_FACTORY_CLASS.getValue)
        else {
          new ComputationOrchestratorSessionFactoryImpl
        }
      }
    }
    sessionFactory
  }
}